D321D485H-A/ TD521D485H-A，the main function is to convert logical levels into differential levels of RS485 protocol, achieve signal isolation, and is an RS485 protocol transceiver module that uses IC integration technology to achieve power isolation, signal isolation, RS485 communication, and bus protection.

The product has a built-in constant voltage isolation power supply, which can achieve 3000VDC electrical isolation. In addition, the product has automatic switching of transmission and reception functions, eliminating the need for CON pins for transmission and reception control, which reduces the complexity of the design to a certain extent.

TD521D485H-A-3 拷贝 TD521D485H-A-1 拷贝

Limited characteristic

Project	working conditon	Min.	Typ.	Max.	Unit
Input impulse voltage (1sec. max.)	3.3VDC input series	-0.7	-	5	Vdc
Input impulse voltage (1sec. max.)	5VDC input series	-0.7	-	7	Vdc
Pin soldering temperature	Welding point distance from shell 1.5mm, 10 seconds	--	--	300	℃

Input characteristic(3.3V series)

Project		symbol	Min.	Typ.	Max.	Unit
Input power supply voltage		Vdc	3.15	3.3	3.45	Vdc
TXD logic level	High level	VIH	0.7VCC	3.3	3.6
TXD logic level	Low level	VIL	0	--	0.8
TXD logic level	High level	VOH	VCC-0.4	3.1	--
TXD logic level	Low level	VOL	0	0.2	0.4
TXD driving current		IT	2	--	--	mA
RXD output current		IR	--	--	10	mA
serial interface		Only compatible with UART interface of+3.3V

Input characteristic(5V series)

Project		symbol	Min.	Typ.	Max.	Unit
Input power supply voltage		Vdc	4.75	5	5.25	Vdc
TXD logic level	High level	VIH	0.7VCC	5	5.5
TXD logic level	Low level	VIL	0	--	0.8
TXD logic level	High level	VOH	VCC-0.4	4.8	--
TXD logic level	Low level	VOL	0	0.2	0.4
TXD driving current		IT	2	--	--	mA
RXD output current		IR	--	--	10	mA
serial interface		Only compatible with UART interface of+5V

Transmit characteristic

Project		symbol	Min.	Typ.	Max.	Unit
data-delay	TXD sending delay	tT	--	--	250	ns
	RXD receiving delay	tR	--	--	110	ns

Iutput characteristic

Project	symbol	Min.	Typ.	Max.	Unit
differential voltage level	Vdiff(d)，no load resistor	1.5	--	--	Vdc
differential input impedance	-7V≤VCM≤+12V	96	--	--	kΩ
Built in pull-up and pull-down resistors		--	47	--	kΩ
Isolation output power supply voltage	Rated input voltage	4.9	5	5.3	Vdc
Bus interface protection	ESD electrostatic protection
Note: The isolated output power pin is only used for external pull-up and pull-down resistors (recommended maximum current<25mA) and is not recommended for other purposes.

More detail please contact us: sales@hlktech.com

	类型	描述
	产品类型	DC-DC模块
	制造商	Shenzhen Hi-Link

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1+	$1.50	$1.50

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中国大陆仓库
10000

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